June 26, 2015
As the Hubble Space Telescope celebrates its 25th anniversary, scientists are reflecting on the key role astronauts played in allowing the telescope to continue making great discoveries.
June 11, 2015
Venus and Jupiter are converging for a must-see close encounter at the end of June. It could be the best backyard sky show of 2015.
May 23, 2015
The common roundworm shares a surprising amount of genetic material with humans - enough, in fact, to make them good substitutes for astronauts in low-gravity medical studies.
May 15, 2015
On Earth, a fast runner takes a few hours to complete a marathon. On Mars, it's taken 11 years. NASA's Opportunity rover crossed that finish line in 2015.
May 11, 2015
NASA's MAVEN spacecraft has detected widespread auroras on Mars.
May 6, 2015
The annual Eta Aquariid meteor shower peaks on May 5-6 when Earth passes through a stream of debris from Halley's Comet.
April 30, 2015
NASA's MESSENGER spacecraft crashed into Mercury on April 30th, ending a years-long mission that made many unexpected discoveries about the innermost planet. Today's story summarizes some of MESSENGER's most surprising finds.
April 29, 2015
The Amazon rainforest and the Sahara desert seem utterly different. Yet NASA satellites have discovered a surprising connection that intimately links these two disparate parts of our planet.
April 21, 2015
When NASA's New Horizons spacecraft flies by Pluto this July, the spacecraft's high-resolution cameras will spot many new landforms on the dwarf planet's unexplored surface. They are all going to need names—and NASA wants you to help.
April 21, 2015
At the end of a day devoted to Earth, people can look to the heavens for a beautiful shower of Lyrid meteors.